Terraforming was meant to modify the eco-system of a planet so that it resembled Earth and could be inhabited by humans. The humans did that to a lot of planets. However, terraforming could destroy the minerals that some humans wanted to mine. This was why the humans started to adapt. They modified their bodies to suit the alien environment. [which?] They completely reworked themselves and had new DNA sequences and new organs. (AUDIO: The Nu-Humans)